Detecting two different forms of liquid water

Swedish scientists discovered liquid water exists in two distinct forms that differ in structure and molecular density.

Liquid water exists in two completely different forms of liquid.(Photo: Stockholm University.)

In a report published in the journal of the National Academy of Sciences (PNAS) on May 31, the research team at Stockholm University, Sweden, discovered water exists in two separate liquids, each of which There are big differences in structure and molecular density, according to Science Alert.

The team used two types of X-ray images to monitor the movement and distance between molecules of H2O, when water moved from amorphous liquid state, frozen liquid to viscous liquid and some other types. They found liquid water not only existed in a single form but rotated between two different forms, high density and low density.

" Room-temperature water cannot determine which form it should be, high or low density, leading to fluctuations between these two forms. Water is not a complex liquid, but two types of single liquid. Simple but has a complex relationship, "said Lars GM Pettersson, a member of the research team.

Most of us are taught in schools that water exists in three distinct states including solid, liquid and steam. But water is not so simple, it can exist in a state similar to plasma. Scientists have identified 70 properties of liquid water completely different from other liquids we know of.

The team's idea comes from the fact that ice can exist in the form of high density and low density. They suspect that liquid water has similar characteristics, so they decided to research it to find out exactly what to speculate. However, this is only the result of a study. Other independent scientific groups need to verify the results before new knowledge is included in the textbook.